Salsa - Anonymous messages in your workplace
digiKam - Professional Photo Management with the Power of Open Source
Bebop - Bebop provides a nice web interface to a list of publications stored in a BibTeX file.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Flaneer - Flaneer provides Virtual Machines for Game Studios, Post-Production video agencies and Engineering companies. Make Unreal Engine, Premiere Pro and Revit way faster and collaborate on projects with your team !
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.